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Flight Reliability

DL 811 · Delta Air Lines

Los Angeles → Miami (LAX–MIA)86% of its flights flew this route. The rest (MIA–LAX) are included in these numbers.

74
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
5 min
Average arrival delay
1.7%
Cancelled
1 min early
Median arrival delay

Based on 424 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

DL 811 departing between 6–9 AM arrived on time 83% of the time, versus 68% between 6–9 PM.

Friday is doing you no favors.

DL 811 arrived on time 91% of the time on Wednesdays and just 70% on Fridays. That gap is worth planning around.

A bit behind the LAX–MIA route.

DL 811 arrived on time 75% of the time, versus 79% across the LAX–MIA route.

A bit behind the Delta Air Lines network.

DL 811 arrived on time 75% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon70%(60 flights)
  • Tue78%(55 flights)
  • Wed91%(57 flights)
  • Thu73%(64 flights)
  • Fri70%(63 flights)
  • Sat73%(52 flights)
  • Sun72%(64 flights)
On-time by departure window
  • 6–9 AM83%(40 flights)
  • 9 AM–12 PM76%(318 flights)
  • 6–9 PM68%(57 flights)
On-time trend by month
76%
May

Jun 77% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202577%31
August 202581%31
September 202593%30
October 202587%30
November 202570%30
December 202574%31
January 202673%30
February 202665%37
March 202658%52
April 202684%38
May 202676%45
Departures on time
79%
Diverted
0.5%
Flights flown
415
Months covered
12

Same route, other flights

Keep nerding

Based on 424 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.